17. What is the de Broglie wavelength of an electron with speed of 10⁶ m/s? The Plank's constant h = 6.6 × 10⁻³⁴ J·s, and the electron mass m_e = 9.1 × 10⁻³¹ kg.
(A) 7.3 × 10⁻⁹ m
(B) 7.3 × 10⁻¹⁰ m
(C) 7.3 × 10⁻¹¹ m
(D) 7.3 × 10⁻¹² m
(E) 7.3 × 10⁻¹³ m

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